!Fishermen's Guild Member Lanosco:

Some time ago, I caught a few strange boxes while fishing. I thought it was strange to catch so many things that weren't fish! 
Most fishermen would've just thrown them back, but I know better! Some people will pay well for such things! 
They must be intrigued by not knowing what's inside... It could be something very expensive or completely worthless!

I have a knack for finding these boxes, but I can't show you how to do it yet.

*(This quest may only be undertaken by a character of level 27 or above.)*